Relationship between laser fluorescence values and visual evaluation of fissure caries in schoolchildren – a field study

Abstract

In our previous study of oral health intervention in children, laser fluorescence (LF) values of occlusal surfaces were reduced after 1 year. The aim of this study was to explore the relationship between DIAGNOdent pen values and clinical status of the occlusal surfaces. The study conducted in 2007 and 2008 in 700 children aged 13-14 included a clinical examination and LFpen measurement of the occlusal surfaces of first and second molars. Four teams consisting of a dental hygienist and a dental nurse performed the examinations on school premises. The dental hygienist scored the surfaces using the Nyvad criteria for caries assessment; the surfaces were then scanned using a DIAGNOdent pen(®) device. The more severe the visual caries category was, the higher the mean LFpen values were. Correlation coefficients between LF values and NY categories were 0.542 and 0.408 in years 2007 and 2008, respectively (all examiners combined). The LFpen values of active and inactive lesions did not differ significantly. The correlation between the mean LFpen values and the NY categories was significant. Fissures can be reliably examined with LF and by visual inspection on school premises if certain special arrangements are made.